Core-box.



No. 869,224. PATENTBD- oGT. 29. 1907.

` A. J. BAZBLBY.

GORE B0X.

APPLICATION FILED NOV. 27, 1906.

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Y No. 869,224. PA-TENTED 0CT.29, 1907.

A. J. BAZELEY.

GORE BOX.

APPLIQATION FILED nov. 21. 190e.

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ARTHUR J. BAZELEY, OF CLEVELAND, OHIO, ASSIGNOR TO THE NATIONAL MALLEABLE CASTINGS COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

CORE-BOX.

Specification of Letters Patent.

Patented Oct. 29, 1907'.

Anplication led November 27. 1906. Serial No. 345,328.

To all ywhom it may concern:

Be it known that I, ARTHUR J. BAZELEY, of Cleveland, Cuyahoga county, Ohio7 have invented a new and useful Core-Box, of which the following is a iull7 clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a central vertical section of a core box embodying my invention7 Fig. 2 is a bottom plan view of the same with the base partly broken away; Fig. 3 is a section on the line III-1110i Fig. 1; and Fig. 4 is a detail view of the guide plate.

My invention has relation to the class of core boxes, and more particularly to core boxes which are designed for the manufacture of cylindrical cores, the interior faces of which are formed with depressions or under-cut portions which by their engagement with the inner wall of the box ordinarily make their removal from the box a matter of difliculty.

The object of my invention is to provide a core box of this character in which the inner wall is so constructed and arranged that it may be readily retracted from engagement with the core, thus leaving the core free to be removed from the box.

My invention also consists in the novel construction, arrangement and combinaion of parts all substantially as hereinafter described and pointed out in the appended claims.

In the accompanying drawings, the numeral 2 designates the outer wall of the core box, to the lower end of which is secured a circular guide plate Swhich is rotatably engaged by a base 4, the rotary engagement being formed by the flange 5 on the base which fits within the shoulder 6 on the guide plate 3. The base 4 is provided with a central stemor spindle 7 which extends upwardly through a central hub within the inner Wall oi the core box, and is secured by means ofthe screw 9 engaging a head portion 8 of the hub, a screw-cap 1() being seated above the screw 9.

The inner wall of the box is composed of a plurality of segments 1.1 and 12, alternate segments being designated by the numerals 11 and the intermediate segments by the numerals 12. The segments, when in the position shown in Figs. 1 and 3, form a complete circle having a continuous outer surface, but the lateral edges of the alternate segments 11 fit the adjacent edges of the intervening segments 12 in such a manner that the segmen ts 11 may be drawn inwardly after the core has been rammed up, after which the segments 12 are similarly retracted or drawn inwardly to permit the core to be withdrawn. Each segment is formed on its face with a radial inwardly-extending plate or rib 13 which slidingly engages a radial slot 14 of the central `fixed hub 15, said l hub being secured at its lower end to the guide plate 3,

and having a slot 14 for each segment.

The lower end of each rib 13 is formed with a horizontal outwardly-extending arm 16 having a depending stud 17 which passes through an elongated radial slot 1S in the guide plate 3 and into engagement with a cam slot of a cam plate 19. The cam plate 19 is formed with two series of cam slots, those of the inner series being designated by the numeral 20 and those of the outer series by the numeral 21. The stud 17 of the segments 11 engage the respective slots 20, while the corresponding studs of the segments 12 engage the cam slots 21. Each of the cam slots 20 is formed with an eccentric portion a at one end and with a concentric portion b at the opposite end; and each of the slots 21 is formed with a concentric portion c at one end and an eccentric portion d at the opposite end, the eccentric portions d and a being at opposite ends ofthe respective slots. The cam plate 19 is secured to the base 4 by means of pins 22, or any other suitable means, so as to rotate therewith7 the base being rotated in any suitable marmer7 as by means of a lever engaged with the notch or recess 23 therein. The core box 2 is provided with the inwardly-projecting flange 24 which engages the segments 1.1 and 12 in the manner shown in Fig. 1 to form guides therefor.

25 designates a set screw by means of which the rotation of the base 4 may be prevented when the segments are in the position shown in Figs. 1 and 3, and the core box is being rammed up.

The operation is as followsz-The segments 11 and 12- having been advanced to form the complete inner circular wall of the core box, the box is rammed up with sand in the usual manner. The set screw 25 is then loosened, and the base 4 is given a partial turn, thereby rotating the cam plate 19. As the cam plate commences to turn, the eccentric portions of the cam slots 2O act to retract the segments 11 until the said studs reach the concentric portions b of said slots. During this movement the studs of the segments 12 have been traveling in the concentric portions of the cam slots 21, but at the time that the studs of the segments 11 pass into the concentric portions of the slots 20, the studs of the segments 12 pass into the eccentric portions d of the slots 21, and the segments 12 are now retracted. The core can now be readily removed from the box.

The advantages of my invention consists in the provision of the segmental inner wall of the box in connection with the simple and positive means whereby a portion of the segments thereof may be first retracted, and the remaining segments subsequently retracted.

Various changes may be made in the construction and arrangement of the parts by those skilled in the art withi out departing from my invention; thus either set of cam slots may be arranged to act rst, and the form and arrangement oi the cam and its mode of engagement with the segments may be changed in various ways.

What I c1aimis1- 1. ln a core box for forming hollow sand cores, an inner wall formed of a plurality of sepa ately movable sec tions having projections on their outer faces, each section having a radially arranged guide rib or plate, and a downwardly-extending arm, and an actuating cam engaged With said arms substantially as described.

2. A core box i'or forming hollow sand cores having a fixed outer Wall, an inner wall composed of similar' sep4 arately movable segments having radial guiding ribs, a central radial slotted hub forming guides for the ribs, an actuating cam engaging the segments, and a rotary base member to which the cam is secured; substantially as described.

l. A core box for forming hollow sand cores having a fixed outer wall, a slotted bottom guide plate secured thereto, an inner Wall composed of a series of radially movable segments having projections on their outer surfaces having studs which p ss through the slots of the guide plate, an actuating cam tor the segments engaged by said Studs, and means l'or actuating the cam; substantially as described.

-i-. A core box for forming hollow sand cores having its inner wall formed b v a plurality ot independently movable segments having projections on their outer surfaces, an actuating cam for the segments, a rotary base member secured to the cani, and means for holdingl the base member against rotation; substantially as described.

A core-box for forming hollow sand-cores, comprising a rotary -base portion, a cam-member carried thereby, a

relatively fixed guide member having a central hub secured thereto, an outer fixed Wall, and an inner Wall composed ot' a plurality of radially movable segments having an actuating engagement with the cam plate through the guide member, said segments also having guides in the hub; substantially as described.

6. A core box, having an outer wall, an inner Wall composed of a plurality of radially movable segments, a base supporting the outer wall and having a rotary connection with the box proper, and means carried by the base and engaging said segments to move the same; substantially as described.

T. A core-box having an outer wall, a base portion supporting said wall and provided with a vertical stem o1' spindle, a hub surrounding the same and having radial slots therein, an inner core-box Wall surrounding the hub and composed of a plurality of segments movably engaged with the slots o1' the hub, and cam means carried by the base portion and engaging the segments, the box and base portion having' a rotary connection; substantially as described.

S. A core box for forming hollow sand cores having an inner' Wall composed of a plurality of separately movable segments having projections on their outer faces, and a rotary cam plate having two series o1 cam slots engagingl the segments, each of said slots having' an eccentric and a con centric portion, and such portions being reversely arranged in the t\vo series o1` slots, substantially as described.

ln testimony whereof, l have hereunto set my hand.

ARTHUR J. BAZRLEY.

Witnesses Ilnxnr F. Porn, llnmzv E. Olin. 

